when i press monitor power on button, error [

Microsoft Windows xp professional w/serv...
January 6, 2011 at 21:01:20
Specs: dell
when i press monitor power on button, error [no signal input or cable unplugged [not sure what this means, no signal? cable,what cable? and then when i plug in the blue part that goes in back of tower,the error message disappears and screen is black but power light is on [its a dell desktop,please tell me what is going on and how to solve this issue,please be detailed cause i am new at this and need to know how to solve this,,thanks.p.s also when i press my tower power on button i see the fan in back running but then it cuts off and when i press tower power on button it blink and shuts off
what's happening,when i turn on my desktop, error 'no signal input or cable unplugged,then when i plug in the colored coded blue cableto the back of tower,it disappears and cuts off

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January 7, 2011 at 04:48:34
If it's acting like you describe, your power supply is shot. It says no signal or check cable because the computer isn't booting up.

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January 8, 2011 at 14:34:08
List the make and model # of your computer.

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January 8, 2011 at 14:40:41
"no signal input or cable unplugged "

Some monitors display that or similar when they aren't receiving a video signal after a short amount of time - if so, they display the same thing when their video cable is not plugged into a video part.

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Related Solutions

January 10, 2011 at 08:41:26
From your PM : "dell dimension....2350"

Please answer all questions in this !!

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- you're getting the message "no signal input or cable unplugged "

You could try the monitor with another working computer, but there's probably nothing wrong with it.

"...cable unplugged "
Cable = the video cable from the monitor that's supposed to be plugged into a video port on the computer. Is it ? Your computer has onboard video - video built into the mboard - a video port is in the same place most of if not all of the ports are on the back of the case.

If you also have a PCI video card in a mboard PCI slot, there is another video port farther down in a slot space at the back of the case - if you have that, you should plug the monitor's video cable into that video port, not the onboard video port.

- "power light is on "

- "i see the fan in back running"

Ok , so the power supply fan is spinning, and the power supply is at least partially working.

Does the hard disk activity led blink ?

- "when i press tower power on button it blink and shuts off"

Apparently your model blinks it's power led when the mboard is in Standby or Hibernate mode. Briefly pressing the power button when the led is on steady may cause the led to blink and place the computer in that mode. That behavior may depend on a bios setting. If you briefly press the power button when that is blinking, the led may stay on steady, or the computer may shut off automatically, depending on a bios setting.
If you hold the power button in for at least 4 seconds, the mboard may shut off, depending on a bios setting.

I've seen with some desktop systems that sometimes the power led may blink if there's something wrong.

Controls and lights
Dell™ Dimension™ 2350 Series

Service tag at location 13 Front view.

Diagnostics lights at location 2 Back view.

Advanced troubleshooting
Dell™ Dimension™ 2350 Series

Diagnostic Codes

Are the diagnostic lights lit up when you try to boot the computer ?

If yes, what colors are at each position ?

Scroll down - Beep Codes

Are you hearing beeps ?

If so, which beep pattern ?

(one short beep while booting is normal)

Dell™ Dimension™ 2350 Series

Adding and Replacing Parts
Dell™ Dimension™ 2350 Series
This is equivalent to a service manual for your system.

Add (or remove) memory

READ the directions.
Remove the memory module(s), wipe off the contacts on the bottom of the module(s) with a tissue ir a soft cloth, install the module(s) according to the directions.

If the heat sink shown here has a lot of dust and lint on it, clean it off, but DO NOT use a vacuum cleaner to do that. Use something such as small artist's brushes, or canned air or canned gas meant to be used inside computer cases.

Make sure any cards installed in mboard slots are all the way down in their slots.

Restore AC power to the case, try booting the computer

If that doesn't help,
Some mboards develop this problem - electrolytic capacitors were installed on them that were not properly made, and they fail eventually - the mboard manufacturer didn't know they were improperly made at the time the mboard was made.

Open up your case and examine the mboard to see if you have bad capacitors, and/or other findable signs of mboard damage .

This was the original bad capacitor problem - has some example pictures.
History of why the exploding capacitors and which mboard makers were affected:

What to look for, mboard symptoms, example pictures:
Home page that site
- what the problem is caused by
- he says there are STILL bad capacitors on more recent mboards.

Pictures of blown capacitors, other components, power supplies, Athlon cpu's, etc.:

If you can see no defective capacitors, the most likely thing is your power supply is failing and you need to replace it.
Failing power supplies are common and can cause your symptoms.
They often partially work, fans and hard drives may spin, leds may come on, yet you may get no video and the mboard will not boot all the way.

It looks like it's a standard sized power supply in the manuals.
If it is, you do not need to buy the same power supply or a Dell power supply. You can replace it with any decent quality standard sized standard ATX PS with the same capacity or greater.

Measure your power supply.

Standard (PS/2) power supply size - 86mm high, 150mm wide, 140mm deep, or 3 3/8" h x 5 7/8" w x 5 1/2" d , or very close to that, though the depth can be more or less for some PSs.

It has a capacity of only 200 watts, but you can replace it with one that has more capacity. It's likely you will most easily find power supplies with a capacity of 300 watts or 350 watts, minimum.
If the power supply has only a 20 pin main connector, that's okay for this system. Most new PSs have a 20 + 4 pin main connector - it can be used with either a 20 pin or 24 pin power socket on the mboard. Your mboard has a 20 pin main power socket.

Don't buy an el-cheapo PS.
See response 3 in this:

Remove or install power supply
Dell™ Dimension™ 2350 Series

All support
Dell Dimension 2350 series



click on Printed Documentation

Owner's manual - Dell™ Dimension™ 2350 Series
That's corrupted !! - loads the first page only

See the part below that about Online Documentation. If your computer still has it's original Dell software installation, the Owner's manual is already on the hard drive.

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